Improve and Complete Documentation Content

[zTgx]

The documentation site (vectorless.dev) is currently minimal — only a single intro page and one blog post. This issue tracks the overall effort to expand it into comprehensive, well-structured documentation.

Current State

• Site infrastructure (Docusaurus, custom theme, navbar)
• Intro page with Quick Start (Python + Rust)

TODO

• Concepts & Architecture — How Vectorless works (hierarchical semantic trees, reasoning-native retrieval, no vectors/embeddings)
• Configuration Guide — LLM provider setup, workspace, indexing options, retrieval strategies
• API Reference — Public API for both Python and Rust (indexing, querying, workspace management)
• Examples & Tutorials — End-to-end walkthroughs (PDF indexing, multi-document queries, custom retrieval strategies)
• Deployment & Integration — Using Vectorless in production, integrating with frameworks
• Contributing Guide — Development setup, code conventions, PR process
• Blog Content — Technical deep-dives, use cases, release notes

Notes

The sidebar (sidebars.ts) currently uses auto-generation. It should be updated to a manual structure once the page hierarchy is defined.